LIGHT BULBS

We have come a long way from Alessandro Volta's 1800 "voltaic pile", alternating discs of zinc and copper interspersed with layers of cardboard soaked in salt water that lit up when connected by a copper wire at either end. While considered a predecessor of the modern battery, Volta's copper wire is also considered to be an early manifestation of incandescent lighting. We have modern incandescent bulbs, thanks in part to Thomas Edison, of many sizes, shapes and color temperatures. We also have small but mighty Halogen bulbs and low energy, long lasting economic LED bulbs.